| Literature DB >> 33459814 |
Seyda Merve Karatas1,2, Lutfiye Ekici3, Ibrahim Develi4, Enes Dertli5, Osman Sagdic5.
Abstract
In this study, the effects of GSM 1800 band radiation on composition, structure and bioactivity of exopolysaccharides (EPSs) produced by Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus were determined. For this, GSM 1800 band radiation was applied to both cultures and characteristics of EPSs extracted from the control groups (K) and the radiation stressed groups (R) were determined. An alteration in the chemical composition of the EPSs was observed and EPS production levels and molecular weights of the EPSs increased following the GSM 1800 band radiation application. Alterations in the functional groups, thermal and morphological characteristics of EPSs following the GSM 1800 band radiation application were confirmed by FTIR, TGA and SEM analysis, respectively. Importantly no alterations in the antioxidant and antibacterial activity of the EPSs were observed following the radiation application. These results suggested the effects of the GSM radiation on final characteristics of EPSs from yogurt starter cultures.Entities:
Keywords: Bioactivity; Exopolysaccharide (EPS); Radiation; Starter culture; Stress
Year: 2021 PMID： 33459814 DOI： 10.1007/s00203-020-02168-4
Source DB: PubMed Journal: Arch Microbiol ISSN： 0302-8933 Impact factor: 2.552